/Engine/Source/Runtime/Engine/Public/DistanceFieldDownsampling.h
static void FillDownsamplingTask ( const FIntVector & SrcSize, const FIntVector & DstSize, const FIntVector & OffsetInAtlas, EPixelFormat Format, [FDistanceFieldDownsamplingDataTask](API\Runtime\Engine\FDistanceFieldDownsamplingDataTa-) & OutDataTask, [FUpdateTexture3DData](API\Runtime\RHI\FUpdateTexture3DData) & OutTextureUpdateData )